TY  - BOOK
ED  - United Nations.
TI  - Appropriate technologies in civil engineering works in developing countries : : an exploratory appraisal of the state of the art / 
U1  - 338 
PY  - 1976///
CY  - New York : 
PB  - United Nations
KW  - Public works
KW  - Developing countries
N1  - Includes bibliographical references
ER  -